Disable DCP if other strategy class is chosen

app/views/admin/dashboard/show.html.slim

@@ -13,14 +13,14 @@ div.mb-4
   = "CodeOcean Release:"
   pre = Sentry.configuration.release
 
-- if DockerContainerPool.config[:active]
+- if DockerContainerPool.active?
   div.mb-4
     = "DockerContainerPool Release:"
     pre = DockerContainerPool.dump_info['release']
 
 h2 Docker
 
-- if DockerContainerPool.config[:active]
+- if DockerContainerPool.active?
   h3 = t('.current')
   .table-responsive
     table.table

lib/docker_client.rb

@@ -230,7 +230,7 @@ class DockerClient
     Rails.logger.info("destroying container #{container}")
 
     # Checks only if container assignment is not nil and not whether the container itself is still present.
-    if container && !DockerContainerPool.config[:active]
+    if container && !DockerContainerPool.active?
       container.kill
       container.port_bindings.each_value {|port| PortPool.release(port) }
       begin
@@ -355,7 +355,7 @@ container_execution_time: nil}
     exit_thread_if_alive
     @socket.close
     # if we use pooling and recylce the containers, put it back. otherwise, destroy it.
-    if DockerContainerPool.config[:active] && RECYCLE_CONTAINERS
+    if DockerContainerPool.active? && RECYCLE_CONTAINERS
       self.class.return_container(container,
         @execution_environment)
     else
@@ -493,7 +493,7 @@ container_execution_time: nil}
     end
 
     # if we use pooling and recylce the containers, put it back. otherwise, destroy it.
-    if DockerContainerPool.config[:active] && RECYCLE_CONTAINERS
+    if DockerContainerPool.active? && RECYCLE_CONTAINERS
       self.class.return_container(container, @execution_environment)
     else
       self.class.destroy_container(container)

lib/docker_container_pool.rb

@@ -9,6 +9,11 @@ require 'concurrent/timer_task'
 # dump_info and quantities are still in use.
 
 class DockerContainerPool
+  def self.active?
+    # TODO: Refactor config and merge with code_ocean.yml
+    config[:active] && Runner.management_active? && Runner.strategy_class == Runner::Strategy::DockerContainerPool
+  end
+
   def self.config
     # TODO: Why erb?
     @config ||= CodeOcean::Config.new(:docker).read(erb: true)[:pool]
@@ -39,7 +44,7 @@ class DockerContainerPool
 
   def self.get_container(execution_environment)
     # if pooling is active, do pooling, otherwise just create an container and return it
-    if config[:active]
+    if active?
       begin
         container_id = JSON.parse(Faraday.get("#{config[:location]}/docker_container_pool/get_container/#{execution_environment.id}").body)['id']
         Docker::Container.get(container_id) if container_id.present?